random kernel hang in zfs

Jan 26, 2026
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Hi,

We have a proxmox 8.3 host running on a fujitsu Primergy RX2540 M4 server. It's running zfs on top of hw raid which I know is not recommended, but I don't think it should lead to this behavior.

It has crashed three times during the last 4 months. I was only able to capture the call trace the last time (see attached photo), but I suspect it is the same every time. When it crashes the system is non-responsive except for ping. Nothing of interest in the logs after hard reset. After the seconds time it crashed I hooked a monitor to it in case I could capture anything of interest the next time it crashed. Hence the attached photo.

It is running RAID6 on PRAID EP420i (LSI SAS3108). I checked all disks with smart, they all report good health.

It is running 8.3 (6.8.12-4-pve), I haven't tried upgrading to 8.4, maybe there i something there. Just thought I post here in case anybody knew anything.
 

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